Sash stop



June 3o, 19251 E. A. MALM SASH STOP Filed May 14, 1923 ATTORN EY WITNESS@ Patented June 30, 1925.

UNITED STATES EDWARD A. mima or wnmina,n :marinusom@ s'asH Appnmion mee )ny 14,

To al?A whom t may' emaern:

Be it known thatI, EDWARD A. vMALM, a. citizen of the. United States, residing at lVadena, in the county-f of Wadena and State of Minnesota., have4 invented new and useful Improvements in SashjStops, of which theY following is a specification.

The object of my said invention is the provision of a sash stop construction that is automatic in operation to hold a Vsash against downward movement from the position in which it is placed, and is adapted to be readily controlled so as to permit of the sash being either raised or lowered as occasion demands.

To the attainment of the foregoing, the invention consists in the improvement as hereinafter described and definitely claimed.

In the accompanying drawings, forming part of this specification v Figures 1 and 2 are views showing the sash stops constituting preferred embodiments of my invention as properly arranged relative to inner and outer sliding sashes and a sash frame.

Figures 3, 4, 5 and 6 areviews illustrative of details of one of the stops.

Similar numerals of reference designate corresponding parts in all of the views of the drawings. v

The sash frame or window casing 1 is in general of the ordinary well known construction. The sashes 2 and 3 are also by preference of ordinary construction, the inner sash being designated by 2 and the outer sash by 3. Each of the sliding sashes is provided o-n one edge with a rack 4, and each is provided at its opposite edge with a drawer roller 5, the said drawer rollers serving to lessen the friction between the sashes and the fram'e and to render easy the vertical move-ments of the sashes.

*or cooperation with the sashes 2 and 3 equipped as described, I emplo the stop mechanisms designated by 6 an 7, respectively, the mechanism 6 for the inner sash 2 being shown in its. preferred arrangement which is slightly below the mechanism 7 for the outer sash 3. The said mechanisms 6 and 7 are identical in construction, and therefore a detailed description of one will suiiice to impart a definite understanding of both. By particular reference to Figures 3 and 4 it will be noted that the mechanism comprises a casing frame 8, located in one of the side stiles of the sash frame, a spur STOP. p l

1923. Serial No-"638,960.

gear 9 disposed in the said casing frame 8. a gravitational pawl 16y mounted in the casing frame for cooperation with the vsaid spur gear 9,.'a spring 11 for yieldtinglyhold ing thespur gear to its werk, and la movable control member 12. yThe spur gear 9is intermeshed with the rack 4y of its respective sash, and its journal is movable in the casing frame 8 toward and from the sash. Said spur gear 9 and the spring 11 are associated with a yoke 11a: which straddles the spur gear and receives the ends of the journal thereof. The spring 11 is interposed between the yoke and the back wall of the casing frame 8. In virtue of its arrangement relative to the spur gear 9 the pawl 10 operates normally' to lock the spur gear and to permit it to turn in one direction only so as to preclude. dropping of the sash until the control member12 is manipulated to bring about release of the spur gear and permit rotation of the same about its axis. As shown the control member v12 is mounted to slide in parallelism to the face of the sash, and is provided with an arm' A13 which is designed by cooperating with the upper arm 14 of the pawl'10 to disengage the said pawl 10 from the spur gearv 9.

Manifestly in the practical use. of my improvement either sash can be raised to any extent desired inasmuch as incident to said raising movement the spur gear 9 complementary to the mentioned sash will ride past the pendent portion of the pawl. When, however., either sash is released after being raised, its spur gear 9 in cooperation with its rack 4 may be depended upon to strongly and positively hold the sash against down- Ward movement. When it is desired to lower either of the sashes the same can be readily accomplished after manipulationof the control member 12 in the manner described for the disengagement of the pawl 13 of the sash from the spur gear 9 thereof.

It will also be noted that my improvement operates automatically to stop a sash, after the sash is raised and that when my improvement is employed it is unnecessary to employ sash weights, pockets, pulleys and cables.

I have entered into a detailed description of the construction and relative arrange-` ment of the parts embraced in the present and preferred. embodiment of my invention in order to impart a full, clear and exact understanding of the said embodiment. I

do not desire, however, tol be understood as confining myself to the specific construction and relative arrangement of parts inasmuch as in the future practice of the invention various changes and modifications may be made such as fall within the scope ofmy invention as defined in my appended claim. Having described my invention, what I claim and desire to secure by Letters-Patent, is

.Stop mechanism for use in the side stile of a sash frame and in cooperation with a sliding sash and a rack at one vertical edge thereof; said stop mechanism constituted essentially of aslotted casing, a spur gear projecting,throughout the front wall of the casing, a yoke straddling. the spur gear and receiving in its sides-the ends of the journal thereof, a spring interposed between the back wall of the casing and the said yoke, a gravitational pawl normally engaging the spur gear to prevent downward movement of asash and having an arm, and a control member manually movable to cooperate with said arm and disengage the pawl from the spur gear and havinga lateral portion movable in the slot of the casing to operatel against the pawl arm.

In testimony whereof I afIiX my signature.

EDl/VARD A. MALM. 

